Spacing bar for use in reenforced-concrete columns



T. KARDONG.

SPACING BAR FOR USE IN REENFORCED CONCRETE COLUMNS.

APPL'ICATION FILED .IAN. Bl, i920.

Patentd Mar. 14, 1922.

ATTORNEY WITNESSES with the,

UNITED STATES THEODORE KARDONG, O1 MINNEAPOLIS, MINNESOTA.

sPAcnve BAR ron use IN nnnnroncnn-oononnrn COLUMNS,-

Application filed January 31, 1920.

concrete columns, and its object is to provide a one-piece structure which will effectively hold the turns of coils used. in the manufacture of concrete columns in properly spaced relation, grouping the terminal turns together and spacing the intermediate turns, spacers of a character permitting them to be readily stamped from strips of metal and then easily applied and clamped in place against liability of displacement,

A spacing bar constructed in accordance with the invention comprises an elongated metallic strip with blank ends and intermediate bends opposite which latter punchedout tongues are formed so that the elongated plain ends may be bent upon themselves to produce loops enclosing a plurality of turns at the correspondim ends of the coil and the inwrmediate turns of the coil may be indi vidu'ally seated in the bends of the strip or bar. with the tongues subsequently bent over the individual turns of the coil to lock them in position.

Then the coil is engaged by a plurality of such spacer strips, it forms a very rigid cage capable of being embedded in a concrete column so as to thoroughly reenforce the column, and as the coil and strips are intimately locked together displacement cannot occur and the reenforcing action is particularly cmcient.

The invention will be best understood from consideration of the following detailed description taken in connection with the accompanying drawing forming a part of this specification, with the understanding, however, that the invention is not confined to any strict conformity with the showing of the drawing, but may be changed and modified so long as such changes and modifications mark no material departure from the salient features of the invention as expressed in the appended claims In the drawings Figure 1 is an elevation, with some parts Specification of Letters Patent.

Patented Mar. 14, 1922.

Serial No, 355,375.

in section, showing spacer bars connecting and spacing the turns of a reenforcing coil;

Figure 2 is a section on the line 22 of Figure 1;

Figure 3 is an edge view of the spacer bar before being applied to the coil and also showing certain parts in section.

Referring to the drawings, there is shown a coil 1 of suitable conformation for use as a concrete column reeniorcement. embedded in a concrete column, it is of advantage to have the turns of the coil in suitably spaced relation throughout the greater portion of the length of the coil while the terminal turns are brought close together in substantial contact, thus greatly strengthening such part of the column, such closely grouped terminal coils being indicatedin Figure 1 at 2, while the individual intermediate coils are indicated at 3.

For each reenforcing cage, there is provided a suitable number of spacer bars 4, each comprising a metallic strip of appropriate width and gage with initially straight elongated end portions 5, sufiiciently long to be bent upon themselves into substantially closed loops 6, so as to embrace and clamp a plurality of turns 2 of the coil 1.

At appropriate intervals along the length of the spacer bar 4 are punched-out tongues 7. each. integrally connected at one end with the bar 4 and having the other end tree, the tongues initially. curving back toward the body of the bar and sufliciently spaced there from to permit the introduction of the turns 3 between the tongues 7 and the body of the bar 4. Punching out the tongues 7 from the body of the bar 4 leaves elongated recesses or slots 8 and the bar 4, where these slots occur, is bent or indented as shown at 9 to constitute seats for the turns 3 and flanking the slots 8.

When the coil 1 has the spacing strips 4 attached to it, the loops 6 at the ends of the strip 4 are made to embrace a plurality of terminal turns, one end portion of the strip embracing a greater number of turns than the other end. In the particular showing of the drawing, one end portion of the strip embraces three turns and the other end two turns, the longer loops 6 alternating in adj acent strips. After the turns 3 are seated in the bends 9, the tongues 7 are returned at their free ends toward the bar 4, thus firmly clamping the turns 3 in the seats 9, with the bars 4 in planes intermediate of the thickness of the turns 3.

The strip 4L with the elongated ends 5, the seats 9 flanking the slots 8, and the tongues 7 formed by the material punched out of the slots 8 but integrally connected with the strips 4, form particularly eiiicient spacing bars, easily applied to the coils 1, and also easily fastened thereto in a manner rigidly connecting the coils in permanently spaced relation against any possibility, under conditions of use, of the coils spreading or contracting and consequently avoiding all liability of the columns cracking'or deteriorating in any way. 7

The turns 3 enter the seats 9 and the free ends 01? the tongues are bent into the slots 8, so that the seats 9 and tongues 7 firmly embrace and hold the turns3 against displacement.

hat I claim is 1. A reenforcing structure for columns comprising a coil withits intermediate turns longitudinally spaced and its terminal turns ,in; contact, and a spacing strip for engaging each of the turns of the coil to form a re- ,enforcing cage therewith, said strip having vits ends formed with embracing loops for a plurality of the terminal turns of the coil.

2. A reenforcing structure for-columns comprising a coil with its intermediate turns longitudinally spaced and its terminal turns close together, and a spacing strip for engaging each of the-turns oi the coil to form a reenforcing cage therewith, said strip hav-' ing its ends elongated and bent back upon themselves to form embracing loops for a plurality of end turns of the coil.

3. A reenforcing structure for columns comprising a coil with its intermediate turns longitudinally spaced and its terminal turns close together, and a spacing strip for engaging each of the turns of the coilto form a reenforcing cage therewith, said strip having its ends elongated and bent back upon themselves to form embracing loops for a V plurality of end turns of the coil, the end 7 loops-0f eachstrip-being of different length whereby one of the loops embraces more turns of the coil than does the other loop, certain of the strips having their longer loops at one end of the coil and other strips having their 7 longer loops embracing the turns at the other .tengue entering the slot between the side walls thereof, whereby the coil is seated and locked both by the tongue and by the corresponding bend in the strip.

A spacing barfor reenforcing coils for V-concrete columns comprising van elongated straightv strip, aseries of elongated slots pro vided at intervals along said strip, bends prov ded mthe strip where the slots occur,

said bendsextending out from one side only of the strip, tongues provided on the strip and'curved oppositely to the bends in the strip by the portionscut from said slots, the

ends of said stripbeing free from slots and tongues and bent to provide loops of unequal length.

6. A spac ng bar for reentorcing coils for concrete columns, comprising an elongated strip with a "longitudinal series of tongues punched out therefrom and integral with the strip leavingelongated slots formed by the punching out of the tongue, the strip where the tongues are punched out beingbent to *form curvedseats on opposite sides of the slots to receive turns of the reenforcing coils, and the tongues being each of a length to embrace a respective turn of the coil with the tree end of the tongue entering the slot between the side walls thereof.

In testimony that I claim the foregoing as my own, I have hereto aflixed' my signature.

THEODORE ,KARDONG. 

